13617979 has 8 divisors (see below), whose sum is σ = 14035680. Its totient is φ = 13206336.

The previous prime is 13617977. The next prime is 13618009. The reversal of 13617979 is 97971631.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13617979 - 2¹ = 13617977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13617977) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3274 + ... + 6160.

It is an arithmetic number, because the mean of its divisors is an integer number (1754460).

Almost surely, 2^13617979 is an apocalyptic number.

13617979 is a deficient number, since it is larger than the sum of its proper divisors (417701).

13617979 is an equidigital number, since it uses as much as digits as its factorization.

13617979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3029.

The product of its digits is 71442, while the sum is 43.

The square root of 13617979 is about 3690.2545982628. The cubic root of 13617979 is about 238.8017765506.

The spelling of 13617979 in words is "thirteen million, six hundred seventeen thousand, nine hundred seventy-nine".